{Were looking steadfastly} (atenizontes (8873)an).
Periphrastic imperfect active of ateniz(935c), a late intensive verb
(intensive a and 	ein(935c), to stretch). Common in Acts and also
in  Lu 4:20  22:56  as well as  Ac 10:4 , which see. {As he went}
(poreuomenou autou). Genitive absolute of present middle
participle. They saw him slipping away from their eyes as the
cloud bore him away. {Stood by them} (pareist(886b)eisan autois).
Past perfect active indicative of parist(886d)i and intransitive
(note i in B instead of ei for augment, mere itacism).